/**
* Returns generated name for a image
*
* @param \Imager\ImageInfo $image
* @return string
*/
public static function createName(ImageInfo $image)
{
$source = $image->getSource() ?: $image;
$id = $image->getParameter('id');
if (!isset($id)) {
$name = md5($source->getPathname());
} else {
$name = Strings::before($id, '.', -1);
}
// dimensions of image only for thumbnail (has source)
$width = $image->getParameter('width');
$height = $image->getParameter('height');
$quality = $image->getParameter('quality');
$dimensionName = self::createDimensionName($width, $height, $quality);
if ($source->getExtension() !== '') {
$ext = '.' . $source->getExtension();
} else {
$extensions = [IMAGETYPE_GIF => '.gif', IMAGETYPE_JPEG => '.jpg', IMAGETYPE_PNG => '.png', IMAGETYPE_BMP => '.bmp'];
if (!array_key_exists($source->getType(), $extensions)) {
$msg = sprintf('Image "%s" is unsupported type.', $source->getFilename());
throw new InvalidStateException($msg);
}
$ext = $extensions[$source->getType()];
}
$fileName = $name . $dimensionName . $ext;
return $fileName;
}
/**
* Returns options part of command
*
* @param mixed $width
* @param mixed $height
* @param null|int $quality
* @return string
*/
private function getCommandOptions($width, $height, $quality)
{
$options = [];
if (isset($width) && (int) $width === 0) {
$width = $this->image->getWidth() . '!';
}
if (isset($height) && (int) $height === 0) {
$height = $this->image->getHeight() . '!';
}
if (!isset($height)) {
$options['resize'] = '"' . $width . '"';
} elseif (!isset($width)) {
$options['resize'] = '"x' . $height . '"';
} else {
$options['resize'] = '"' . Strings::trim($width, '!') . 'x' . Strings::trim($height, '!') . '^"';
}
if (isset($width) && isset($height)) {
$options['gravity'] = 'center';
$options['crop'] = '"' . $width . 'x' . $height . '+0+0"';
}
if (isset($quality) && $quality !== 0) {
$options['quality'] = $quality;
}
$command = [];
foreach ($options as $opt => $value) {
$command[] = '-' . $opt . ' ' . $value;
}
return implode(' ', $command);
}
/**
* Resize image and save to target file
*
* @param null|int|string $width NULL: original width; integer: width in pixel; string: others specific (50%)
* @param null|int|string $height NULL: calculating by ratio; integer: height in pixel; string: others specific (50%)
* @param null|int $quality
* @return \Imager\ImageInfo
* @throws \Imager\InvalidArgumentException
* @throws \Imager\InvalidStateException
*/
public function resize($width = null, $height = null, $quality = null)
{
// if $width and $height dot defined, than set $width to zero (generate origin size)
$helpWidth = !isset($width) && !isset($height) ? 0 : $width;
$this->checkDimension($helpWidth, 'width');
$this->checkDimension($height, 'height');
$this->checkQuality($quality);
$generateWith = $helpWidth === 0 ? $this->image->getWidth() . '!' : $width;
$generateHeight = $height === 0 ? $this->image->getHeight() . '!' : $height;
$generateQuality = $quality ?: 0;
$source = $this->image->getPathname();
$options = $this->getCommandOptions($generateWith, $generateHeight, $generateQuality);
$target = $this->createTempFile();
$command = sprintf('convert %s %s %s', $source, $options, $target);
$this->run($command);
$img = new ImageInfo($target, $this->image);
$img->setParameter('id', $this->image->getFilename())->setParameter('width', $width)->setParameter('height', $height)->setParameter('quality', $quality);
return $img;
}
/**
* Moves image to target
*
* @param \Imager\ImageInfo $image
* @param string $target
* @return \Imager\ImageInfo
*/
private function moveImage(ImageInfo $image, $target)
{
FileSystem::rename($image->getPathname(), $target);
chmod($target, 0666);
return new ImageInfo($target);
}
